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**Janiffer****Member**- Registered: 2008-04-26
- Posts: 12

suppose A is a 4x3 matrix and C is a 3x4 matrix such that CA=I3. Suppose further that for some given b in R4, the equation Ax=b has atleast one solution. Show that this solution is unique...

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**JaneFairfax****Member**- Registered: 2007-02-23
- Posts: 6,868

Multiply both sides on the left by C.

[This is my 2000[sup]th[/sup] post.]

*Last edited by JaneFairfax (2008-05-12 13:06:44)*

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**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,239

JaneFairfax wrote:

[This is my 2000[sup]th[/sup] post.]

How many years did it take you? I want to reach 2,000 as well.

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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**iamaditya****Member**- From: Planet Mars
- Registered: 2016-11-15
- Posts: 766

How many years did it take you? I want to reach 2,000 as well.

According to her date of registration and her post date, it took her 1 year 80 days to reach 2000 posts.

Practice makes a man perfect.

There is no substitute to hard work

All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

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It appears the [sup][/sup] tags do not work anymore.

**LearnMathsFree: Videos on various topics.New: Integration Problem | Adding FractionsPopular: Continued Fractions | Metric Spaces | Duality**

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**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,239

iamaditya wrote:

How many years did it take you? I want to reach 2,000 as well.

According to her date of registration and her post date, it took her 1 year 80 days to reach 2000 posts.

Wow, I hope I can reach it at least in 2019.

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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**iamaditya****Member**- From: Planet Mars
- Registered: 2016-11-15
- Posts: 766

zetafunc wrote:

It appears the [sup][/sup] tags do not work anymore.

What was the [sup]...[/sup] tags used for??

Hi Monox D. I-Fly, You can also reach it in 2018 if you continue posting in this rate.

*Last edited by iamaditya (2017-05-23 18:39:42)*

Practice makes a man perfect.

There is no substitute to hard work

All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

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They were used for superscript, i.e. changing text from 2 to ².

**LearnMathsFree: Videos on various topics.New: Integration Problem | Adding FractionsPopular: Continued Fractions | Metric Spaces | Duality**

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**iamaditya****Member**- From: Planet Mars
- Registered: 2016-11-15
- Posts: 766

Then why was it removed?

Practice makes a man perfect.

There is no substitute to hard work

All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

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I think the forum was updated and the tags haven't yet been updated (or are incompatible with the new forum).

**LearnMathsFree: Videos on various topics.New: Integration Problem | Adding FractionsPopular: Continued Fractions | Metric Spaces | Duality**

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